As Agent Mackelway follows the patient that asked him about the 50-foot fish, he, Mackelway, puts some paper into his left jacket pocket. When the shot changes, he's holding the paper in his right hand. At the next shot, the paper is gone.
(at around 1 min) The agents are trying to pinpoint missing people on a map with locations marked with yellow push-pins. One of the people missing was from Dyersville, Iowa which is strange for 2 reasons: 1. the dot is located in the south-central portion of the state hinting that it may be the capital Des Moines and 2. Dyersville is in the far eastern part of the state while the lead agent points to eastern Nebraska.